Air brake



Dec, 14 1926.

AIR BRAKE Filed June 17, 1926 A, SILVENE 3 WITNESSES A @13h05/ML www . ATTORNEYS Dec. 14 1926.

A. slLvENE AIR vERARE Filed Junev 17, 1926 2 Sheets-Sheet 2 I WITNESSEB #fuma/@L5 @1w MMV@ ATroRNEYs l Patented Dee.

i Application iled June# 17,

V,This invention; relates Vto'an yair brake?V mechanism` and has particular reference ltov a control valve wherehfylthe use `of the triple :valve ordinarily employed is l'eliminated and 5 theopeiation,ofthe system is entirelyunder the Control of tlieengineerin the calo-1l i An object of the `invention is to'provide valve und-er the v"Qontrol of the engineerl which will VVpermit pressure .in 'the auxiliary lo reservoir to he relieved when thelorallzes"arel to heI released solas to insure a quicker release.

l A further object istoiprovide independent means forcharging the supplementary r-esei 15,.` voirand tocontrol the vuseof such charge.

' inderonone sideofthepiston C oinrnunicatesf; iWththtlan:ppwmdon the 'otheijsdeV otheypiston communicates with! an 'auXilg This inventionj-is an improvement on iny pi'iorjUnitedv States patent entitled Auto- Vmatic air brakelilrlle' `,patented Novem- Vbei'- nur-1924.1 L jv '1 p The 'system under which/thisvalve operatesiis of that class wherein air "under Vpressure is normally' inaintaine'd'in the traini 'pipeandA on both sides of vthegpiston ofthe brake I cylinder and in the [auxiliary` reser 1 Y 25evo1r` of"eacli vehicle of theftrain; and thefV ybrake is appliedby a reduction of pressure inA the train pipe-and in the spaceof thecylindei1 on one side of'tlielpiston whereby theair, onv the otheiside of tliepiston, whichl p 130= is injconimu'nication with Ithe auxiliary res-- ervoirw'hich extends; to movethe pistoir outward and apply the brakesA i The inventionfis illustrated' in -the 'draw-QV linge, l of Which-'-y 4 0 through the control valve taken-'onfthe lines 2 2 of Eigures 3 and Il;

` VFigure 3 is a section taken `on thejline:

3f?) ofiFigureQJ looking in the direction of l the arrows;r

il onthe lineV of Figure Figure 5 is afpartial` Sectio Figure .2'. showing thel parte V in the positions they assume during average applications l -59zgof the brakes; v

l l-ligure'g is a vsimilarisectionshowing the.

' part-s inthe position they assumerwhen strong application of the brakesl sfbeingf 'I 1 iliary reservoir l5.V Thisend' of `tli,ecylinfmade;

5 Figure islidevalvef 1 f Thefiornijothe? invention shown in; the

kspirit of [the invention as set orth ir 1ft appended'claiinspredetermined[release of air rorn the tary'reservoirwhicli in aJ certain position of Figurel is' a side-elevationpartlyin'section'showing the brake-,cylinder with Vits Figure' L is ,a horizontal -section I taken .siinilar to is a hottonifplanfview ofthe auxiliary` airiclischaigeport igure 8 is anl inverted plan view. otthe drawings isa preferred forni, although itv 'is' understood that niodicationsin the eon-`v struction ,and arrangement of the :parts i and in tliegcharacter otthe materials' use dymayy he adopted l without departing-[troni the lie'A ln, its generalaspect. the inventionlcon'fv; Y cerne afcoinloination which includes a brake cylinder. having piston thereinivj The "oyl iary reservoir. astenedy i to g tlielauxiliary i positionr of its fpartsgis `adaptedj'to 'p erin'itfl p here;v lien the llorake ypis lon is ki reservoir' through the valve .into the 1a tn io treine vopen position air from the trainpipeSO 4 canV pass around ithe piston ,into :theauxiliary reservoir to "chargef thesaine;v Gon-. fi

nectedto the .control val-ve is ja suppleinen'f the parts ofthe valve willbeohalrged from;

the train pipe. andin another position'otthe v valvewill beconnected in. series'w'ithfthe l auXiliaryreservoir,to,insure aV quick, .s trong r and, positivev application poffthe: loralfes.

The oontrolvalve infV general comprises. ai slide valve connected to a pistonlwhixchoperl-g ates lit. This pistonis-con-nected' fwithfthe train pipeso that-airpressure orilack o iijair pressure inthe train pipe ycauses the piston t0 "more non@ Wav/erika ether" rid .Genee- :95V f1 'i quentlyfinoves the valve. Tlie',valveco' trol's series of ports which leadto the sup- Q`l plementaryjreservoirlttoluthe train pipe'a-Iid.

f to anlfauxiliary valveandpiston whichlc'onfl l trolthe low of airiroin vthe auxiliary res-" 10( A aS-shwaf-in- Figure-11, ",lipiovid@ @brakecylinderflO, havinglgffa'l .piston llv therein vandl 'isropenas l at 14 and' oonneeted with an. aux?v j der 10 Vis groovedlasat 16r toperinit air',

Apao

from-the train pipe 17 Y to pass through the Connecting pipe .I8 intotheY Cylinder andV "around the piston ll into the `auxiliary reservoir '15 Yto charge ythe saine. I alsovshovv Supplementary reservoir V19 connected-,by a

. pipe 20 to control valve 2l. The'trainV pipe 17 iscalso connected to4 thisy control relve by a pipe 22.

. `In FigureQ I show a section of the con# trol valve showing it in position Vvagainst the -rearWall 23 of the auxiliary reservoir Y 10,*,a port 24 (see 'FigureD connected With thevalve in a'iiianner to be hereinafter de- VAserib'ed. Thisvalve comprisesa` body portionf25 ivith a removable head '26. The body l, portion! is provided with a cha'iiiber'inl whichV iisrseateda valve eylin'der, 27 heldin place lby a head 28, secured to the body portion byV vlzo.

bolts-'29. The bo-ttoni'oi' this -eylinder is flattened as at `30 and is provided with ports 31,582, 33 and 34.vv 'The port 3l is connected With 'a passage 35' leading to they pipe 22 connectedvvith traiii"`pipe 17. i The port 32 connects with Li-passage 3G in the body por. tion leadiiigto acylinder'? also disposed Yiii the'body'portion. Theiport 34 connects coniiected. Y Y Y `Another pa'ssage'42 in the body portion connects the bottom of Ythe valve with this chamber40,y and this passage is normally nectiiigwith the auxiliary reservoir 155Y is f Yfclo'sed by'aplug 43. but can beemployed; in

f in thevalvecyliiider 27 a valve 44 is adapt-Y ed to slide, this valve being held on the bots g tom ofthe sleeve 27 by'nieans ofthe springV 45. This valve ismounted von a. stem 46 to almanne'r hereinaiitertobe described. Nithwhich a piston 47 vis connected, this stem eX- tendiiig beyondthe pist-oniiito a bore *'48 in the Cover plateV 46. Aspiring 49 is a com'- f pression spring which tends tolioldthe pis- 56 ton and slide valve Vv44V iii-the Vleftlhaiid position Within the chamber inivhich the piston 47 slides. lThe Y'spring `49 is Ljust strong venough to hold thel piston and slide valve 44fto. the leftl., In any event the pis toniVr and slide'yalve Will be Aso held,V because a' normal air'pressure ofr90 to 110 pounds Vusually carried and maintained.Would-hold i they piston in this position therei'ore,V is v'the main valve Controlling .pis` ,ton.VV The'riglit hand sideof thel piston isfoonnected by means of a siiiall'passage 5,0 Vto the passage `35 leading` tothe-pipe 2Q, and

VWhich isv connected vvi-th the Atrain line 17. K the lovv'er partV ofV the body portion I .disy

. v pose the chambers 37 and 40 `previously nien- Y tioiieds These are connectedV by small pasf This piston sages suoli as 51. Innthe chamber 37 an auxiliary control piston 52 isv adaptedtoy slide; VIn the chamber 40 a. valveLS'is adapted to movej the rvalve Vhaving a stein Y541mltending-into a bore formed Vin'athreaded vcap 56 closing` the' end oin the chamber 40.V A threaded cap 5'? closes vthe end oi'chambei' 3T. The piston 52aiid tlieval've Y v Y Y f iiectedby a stem 58. It Aivillb'e'nuticed that Y e@ are contlie rchamber.V 47a, in which the piston 477 V`slides7 is providedwith a grooveQ so that in Ytli'e-lefthand position lof the pistoni, as

shown' in Figure 2, any` air pressure canl reach beth sides oi" thejpistonfThebottoni oi the valve 44 has tivo inaincut-out portions '60 and 6i and anuiidercut groove V62 the right hand encltliereot,l as 'shoivnfin VIihgure 2. lhe' valve .E3/is adapted to: be held against this seat by means of a com-Vv pression spring 63. e

inthe operation of the device Wevvill assume that the engineer moves his bralre valve to applyrifull pressure to th'etrain pipe V17. YThis pressure Willv flow vthrough the pipe 18 intoa brake cylinder, movingtlie ybrake piston VVl1 to the right to release jthe bra-kes. Vvygllienr the vpiston is iiiits-right hand position, shown? vin Figure l, the "air Will iloiv' through the by-pa'thsli and charge thel auxiliaryreservoir 151 At the same time the pressure Willfloiv throughv pipe k52,2,passage 35iV passage 50, into-chamber 4Triand `iiio-ve` the piston 47 to the extreme lett to the posi-- into the supplementary reservoir. 19, vtoy till the same by Way of thepassa-ges 35,y Y50,59, and port 34.` -Y 1^ f Y By Way. of illustration, We 'Willsuppose the engineer makesv an easy reduetion ofthe vair passage iny thetrain pipe 17. This re-Y pressure as described. Y When tliefpartsare in the position shown in Figure Vf2 they Will .by ,the fair' pressure fin lthe supplementary? reservoirf'until it .assumes the position shown vtion shown in Figure 2. Air Willvalso pass Yoausethe piston to move tovt-heright Y Vagainst the action of spring 49 and-:assisted 110k iii Figure 5;- In lthis-positionthey ports 31 i and '32 are c'oiineeted,`tliiis c'onnecting'passages'aiid. This'ivill-cause a reduc-` tionof pressure on the lett side of piston 52V to tend to hold lthe valve l53 even vmore vtightlyfonits seat. fv At the spa-me time that-fthe f pressure in theptrain pipe is' reduced the pressure Will'be reduced on theV le'ftlside'oi brake piston ll permitting theyair 'in 3 the, Y Y. auxiliary reservoir 15 to force thepiston ll After the bralesrha've been applied thus; easily and it is desired to release the brakes vtoV the lett side as lseen in' .Figure pro# duce an' easy-applicationot thebrakes. y .p

With the parts inthe position shown in Fig-Q y Aure 5 the engineerinereases the air pressure which iiowfs through `passage 35, through ports 31and132, passage 36 Vto the lefthand 10H5 ductionoipressure frointhe normal releases f .back to its normal Lari-,oss

ingl'the piston te-inove sliglivtl'yftov the right. ThisA Will tendf4 toi'lifttlie auxil-iaryfcontrol valve T53 oli `its-.seatfand ivifll allow fairto I more quicklyi f c l `Wah' the' parte "similia uis psfiiionfii lustrated in Figures Alf3-and 4,' iveV `vvill'a's? sume thatthe ,engineervwisliesto nia-kea-V very quick., and'".strongfapplication' of ythe brakes, in `ivl'ii'chl casehe causes a very' heavy reduction of air in the train pipe.V rlfhis will' reduce thevair pressure to theriglitl piston vf'vwhich will Inovemto the extremeV right Vhand position shown in Figure 6. ln this position the train pipe7 port 3l and the aux'- `-`Yiliary cylinder port 32 areconnected,thus

yinsuring the usual piston'seating of the valve 53;"At lthe sameftimeports V83 andr 34% are" vconnected!'This permitsv the connection of pipe 20 through the` supplementary reservoir 19 iviththe, passage 39 leading to the chain-l ber 40, Vsothat theV supplementary air `will pass from the chambertO throughthe pas.-

Vsage 41,k port 124, into fthe auxiliary reseryrv .voir 15 toauginent the auxiliary'air presi sure. To release from this position, the action requires the engineer to bring vthe train pipe pressure bac-k to normal', WhcreupoiritlieI` e parts are moved back to' the position-shown inFigure 2, vAs aftoo rapid lifting oi' piston 47 and slide valve 44 Would close port 34 before it hadY time to allow the presen/reato i Voperate the piston 52, thepassage 50 is made of small' dimensions.

VThe groove 62 isl cut in the slidevalve lli` so' that .supplementaryair is, during averager n applicationsof the brakes, operating' on .top 'of piston 47 to prevent a too Arapid' movei :ment'of the same to normal position.' The plug lshown in the passagefliQ connecting Awith theV chamber 40 isplaced in-tliis position -in case a valve Were disposed' in any otherrelation to the Wall of the auxiliary l connected to thisrpassage `v and the 'plug 'e screwed into thevpassage 41', which 'isnoiv reservoir than as shown. Iffthis change Were made', the plug could be taken out'and a pipe shown as connected voir.v n.

to the auxiliary reser- "What I'clairn is: Y i. i. 'i l 'le In combination,y an air brake cylinder j having a piston therein,v anvauxiliary reservoir connectedy to said cylinder, a control 'valve connected .to the "auxiliary reservoir, a supplementary reservoir connected i to the l control valvea train pipe connectedto the brakeA cylinder'v and Y to the control valve,

storing lbralie fvali'fe connected to' ythe `ai'i'xi-lia'ry reservoir, a supplementary reservoir,,connected vto the,

`brake cylinder and' vto the control valve,

ervoir and lthe' auxiliaryreservoir arexcony, 'e nected in seriesv forth'e'purpose ofau'grnenteV y ing the action of the; air'on the bralrefp'istonf means: inthe vvalve]:operated when vthe" air is` restored tonorinal inthe train pipe, afteij-,

a-.reduction Wherebyj the air inY the auxifliaryreservoir vis allowed to escape to a Vslight extentl ythr iughthe control valve 4into the latinosphere i''or'rth'e fpurpse` ofv assisting in're'-4 more-rapidly'. e .4 .Y l v 2. In"..combinatienj an* air ybra-lie cylinder-L havinga Ypiston therein, anauxiliary raser-"-A Ivoir'` connectedfto sa-idfjcyliiiderfa control-'f control valve, va tivai-"I'i"l Ipipe connected? to the mea-nsin thelvalveoperated ilvhenithel air is restored to normal in the train pipe after a reduction vvheireby the airQfi'nr auxiliary'` r *Q i reservoir is allowed tofescape to-a .slight ex" tent through the control valve into-the at',- mosph'e're for the purpose of assisting'iin vre'- y storng'brake 'lpistonsf-t'o3v normal position more rapidly, and means in the valvey operr ated When the air in the-trainppe is established at a normalvaluetoL cliargethe supl valve-from the.trainpipe` x .3.In co ylbinatioman, lairA brake cylinder i' having a` pistontherein, an auxiliary.reser-v voir 'connected to saidfcylinder, af.' control-` valve .connected to the auxiliary reservoir, v a supplementary reservoir connected Vto the Y. control-valve, a train pipe connected to the Y brake cylinder and to thecontrol valve, and f means in the valveoperated when the air isV reduced in the train pipe to a maximum kex 1 tent wherebyther/supplementary reservoir andthe auxiliary reservoirV are connected in Y fseries for the purpose of augmentingtheV action'of the air fon the brake pistonv in such Van emergency application of the brakes;y

4. In combination; an lair brake cylinder having apiston therein, an auxiliary' reservoir connected'to said cylinder, a control l valveconnecte'd to theauxiliary reservoina supplementaryv reservoir connected Vto' the control valve,` atraiiiv pipe'connected to the brake vcylinder and tothe controlvalve,V means inthe valve Voperated when the air in the train pipe lisfestablished ata?V normal `value-to chargethe supplementary reservoir through the [control valve :trom the trainY `pipe, 'and means inthe valve operatedwhen l the air is reducedin4 the traiii'pipetoy a 'max-j iinuin extent 'whereby the ysupplementary res'- in such an brakes. y I y f5. In, combination, an airbrake cylinder having a pistontherein,v an'auxil-iary reser-V voir connected to saidfcylinden. a control uvalve connecte'd'to the auxiliary reservoir, a

emergency application l' of .the

,supplementaryreservoir connected to the *130. y

pistons' -to normal"position!A Y 00. I 4plementary reservoir throughy lthejcontrol *I control Valve,r a trein pipeeonnected tothe brake' cylinder and tothe `control. Valve,

means in the valve operated when the .air

restored'to normal in the train piper'arfter :i

A"reduction Vwherebyy the vair in the auxiliary tent *through the controll valve intorthe 21tmosphere forlthe purpose of assisting in rerrinentary YVreservoirand the 'anxiliarylrreserf' f storing lorziflre pistons to normal position more rapidly, meansm tlievelve operrfc Y'edwheV Vthe @i reduced in thejtrein pipe to a' nia-xnnuinf extent- Whereloy the supple- Voirare' Connected in series lorrthepurpose (if-augmenting the action of the air oirtlie lorelepistonin 'suchen einern'eney application of the'bralres; i t 6. In combination,Y zur air brak-e cylinder haringfatv piston Ytherein? an auxiliary reser- Voir connected Vto said cylinder7V a Control ,Valve connected to the auxiliary reservoir,v a

supplementary reservoir connected to the reservoir is allowed to escape to a vslight eX-iV control"valve, .af train pipe oon'nectedv tothe brake y' cylinder` and to pthe vcontrol lValve5V ineens in the Valve operatedrwhe'n theairfls 'restored to .normal in the-,trein pipe after@ reductionV whereby the air.r inthe ziuXilieryreservoirv 1s allowed to escape-to a slight e'X-n tent throughr the control Valve into the at- ,mosphere for the purpose'of Vssistingrin re-V jstoring brake rpistons Vto normal Vposition more rapidly i leens thel Ylve operated vwhen the :ur in the trein pipeis vest'-ihli'shed ervoir are-connected in series forv the purpose of augmenting the action of the air yonL-thflx;V v

brake pistonr inl such an einergencyapplioationof thebrakes.

Y ANTHONY simmer] 

